Hida Takayama - 飛騨高山

This town located in Gifu prefecture is full of National Treasures and helds one of the three most important festivals in Japan (during spring and fall). They've preserved a whole neighborhood as it was during the Tokugawa period, one of the mansions of Lord Kanamori of Takayama Castle (and Government House later), the Yoshijima Heritage House and the Kusakabe Folk Museum both built during the Meiji period, the temples, the beautiful Hida Folk Village and even Jomon period ruins.